塑料/聚乙烯 (SBR) 复合物改性青的长期衰老行为
Chengwei Xing1,2, Mingchen Li3, Lingxiao Liu4
1Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, South 2nd Ring Road Middle Section, Xi'an 710064, China.
Materials (Basel, Switzerland)
|July 14, 2023
概括
回收塑料提高了的高温性能,但低温性能很差. 添加乙烯 (SBR) 增强了塑料改性的低温性能和耐老性.
科学领域:
- 铺路工程工程 铺路工程
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 废塑料可以提高在路面工程中的高温性能.
- 低温性能差,限制了塑料改性的广泛应用.
- 长期的老化会对改性的性能产生负面影响.
研究的目的:
- 研究塑料/ styrene butadiene (SBR) 复合物改性的长期老化行为.
- 评估废旧聚乙烯和SBR对青在老化前后的风质性质和分子重量分布的影响.
- 确定老化改性的分子重量分布和质性质之间的相关性.
主要方法:
- 改性基石与废聚乙烯 (4.5%,6%,7.5%) 和3%的SBR.
- 在长期老化之前和之后测量了质性质 (复杂模量,化因子,百分比回收,不可回收的爬行合规性).
- 分析了分子重量分布 (大分子大小百分比-LMS P,重量平均分子重量) 和计算的衰老指数.
主要成果:
- 塑料的加入显著提高了高温性能 (例如,塑料7.5%的复杂模量增加了1127.55%).
- SBR进一步提高了高温性能和耐老化的性能.
- 修改增加了大分子大小百分比 (LMSP) 和重量平均分子重量,LMSP与质性质有很好的相关性.
结论:
- 塑料和SBR修改改进了的高温性能和耐老性.
- LMSP是一种可靠的指标,用于预测老化改性的质性质.
- 优化塑料/SBR复合材料改造为提高路面工程中的青性能提供了一个有希望的解决方案.
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